DRC-2016-004798 - 0901a06880616489

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State of Utah
GARY R HERBERT
Governor
SPENCERJ COX
Lieutenant Governor
Department of
Environmental Quality
Alan Matheson
Executive Director
DIVISION OF WASTE MANAGEMENT
AND RADIATION CONTROL
Scott T Anderson
Director
MEMORANDUM
TO: Phil Goble /
FROM: Dean Henderson
DATE: February 4, 2016
SUBJECT: Review of the 3rd Quarter 2015 Nitrate Monitoring Report for the Nitrate Contamination
Investigation, Energy Fuels Resources (USA) Inc. (“EFR“) White Mesa Uranium Mill,
near Blanding, Utah
The Utah Division of Waste Management and Radiation Control (“Division”) has reviewed the EFR
November 23, 2015, White Mesa Uranium Mill 3rd Quarter, 2015 Nitrate Monitoring (“Report”) for the
Nitrate Contamination Investigation.
For the review of this Report the following regulatory enforcement documents were used:
• Corrective Action Plan for Nitrate White Mesa Uranium Mill near Blanding, Utah, May 7,
2012, (“CAP”) approved December 12, 2012.
• The EFR Quality Assurance Plan, June 7, 2012, Revision. 7.2 (“QAP”)
REVIEW
Monitor Well Sampling for the 3rd Quarter 2015
In the quarter the following monitor wells were sampled and analyzed for inorganic chloride and nitrate
+ nitrite (as N) as required in the CAP:
TWN-1, TWN-2, TWN-3, TWN-4, TWN-7, TWN-18, TW4-22 (pumping well), TW4-24 (pumping
well), and TW4-25 (pumping well), and Piezometer 1, Piezometer 2, and Piezometer 3.
In each quarter the monitoring wells were purged using the three approved QAP well purging strategies
and meet QAP requirements for each strategy:
195 North 1950 West • Salt Lake City, UT
Mailing Address P O. Box 144880 • Salt Lake City, UT 84114-4880
Telephone [phone] • Fax [phone] -TDD (801) 536^4414
wuxw deq Utah gov
Printed on 100% recycled paper
Page 2
1. Purging two casing volumes with stable field parameters for specific conductivity,
turbidity, pH, redox potential, and water temperature (within 10% RPD):
Wells: TWN-1, TWN-4, and TWN-18.
2. Purging a well to dryness and stability of field parameters for pH, specific conductivity, and
water temperature only after recovery:
Wells: TWN-3 and TWN-7
3. Continuously Pumped Wells that are considered sufficiently evacuated to immediately
collect a sample:
Wells: TWN-2, TW4-22, TW4-24, and TW4-25
Chloride and nitrate + nitrite (as N) were analyzed for methods consistent with the requirements of the
QAP.
QAQC
Holding Times
The method holding times for the quarter and parameter for samples collected at each monitor well were
received and analyzed within the required holding times in the QAP.
Receipt Temperature
All samples were received within the required QAP temperature limit of 6° C.
Detection Limits
All sample sets were measured and reported to the required QAP reporting limits.
Sample Duplicates
One duplicate sample was collected for the quarter. A duplicate of TWN-4 was the collected and
identified as TWN-65. The duplicate sample analytical results for this sample/duplicate pairs were
within the 20% acceptance limits as required in the QAP (see Table 2 below).
Groundwater Head Monitoring for 3rd Quarter 2015
Depth to groundwater was measured in the following wells and/or piezometers as required in Part I.E.3
of the Permit:
• The quarterly groundwater compliance monitoring wells.
• Existing monitoring well MW-4 and all of the temporary chloroform investigation
wells.
• Piezometers P-1, P-2, P-3, P-4 and P-5.
• MW-20, MW-22 and MW-34
• Nitrate monitoring wells.
Page 3
• The DR piezometers which were installed during the Southwest Hydrologic
Investigation.
In addition to the above, depth to water measurements are routinely observed in conjunction with
sampling events for all wells sampled during quarterly and accelerated efforts, regardless of the
sampling purpose.
All well levels used for groundwater contour mapping were measured and recorded within 5 calendar
days of each other.
Estimation of Pumped Nitrate Mass Removal
The 3rd Quarter 2015 report reported estimated 118.6 lbs. of nitrate were removed from the chloroform
pumping wells (MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, and TW4-20) and the
nitrate pumping wells (TWN-2, TW4-22, TW4-24, and TW4-25). Of the 118.7 lbs. removed
approximately 107.6 lbs. or 91%, was removed by the pumping wells inside the nitrate plume. In the
attached Table 3, the DWMRC shows calculations that verify these reported estimates.
Reporting
Each Report included the following information as required in the CAP:
a) Introduction
b) Sampling and Monitoring Plan:
i. Description of monitor wells sampled;
ii. Description of sampling methodology, equipment and decontamination
procedures;
iii. Identification of all quality assurance samples, e.g. equipment blanks
duplicate samples, etc.
c) Data Interpretation:
i. Interpretation of groundwater levels, gradients, and flow directions. The interpretation will
include a discussion on: 1) current site groundwater contour map, 2) hydrographs to show
groundwater elevation in each monitor well over time, 3) depth to groundwater measured and
groundwater elevation from each monitor well summarized in data table that includes historic
groundwater level data for each well, 4) calculations documenting quarterly nitrate mass
removed by pumping;
ii. Interpretation of all analytical results for each well including a discussion on: 1) a current
nitrate isoconcentration map, 2) graphs showing nitrate concentration trends in each well
through time and, analytical results for each well summarized in data table that includes
historic analytical results for each well; and
iii. An electronic copy of all laboratory results for groundwater quality monitoring conducted
during the quarter will be provided to the Executive Secretary.
d) Conclusions and Recommendations
Page 4
e) Copies of EFR field reports, laboratory reports, and chain of custody forms. The nitrate plume is
defined to include any monitoring well that has concentration of nitrate in excess of 10 mg/L.
Evaluation of the Chloroform Contaminate Plume and Its Associated Contaminants
Bounding And Hydraulic Control of the Chloroform Plume
Groundwater monitoring data up to the 3rd Quarter, 2015 monitoring event appeared to show that the
nitrate contaminate plume (“Plume”) is bound by up gradient, cross gradient, and down gradient wells
that have a nitrate concentrations of <10 mg/L (GWQS = 10 mg/L). In addition, based on water level
data, groundwater contour, and capture zone maps in the Report it appears that upgradient of pumping
wells TW4-19, TW4-20, TW4-22, TW4-24, and TW4-37 the nitrate Plume is being captured.
Conclusions on Compliance with the CAP, QAP
Per the Division review it appears that the 3rd Quarter 2015 Nitrate Monitoring Report for the Nitrate
Contamination Investigation, Energy Fuels Resources (USA) Inc. complies with the CAP and QAP.
Therefore, a letter will be drafted for the Director Signature, notifying EFR of the review and closing-
out of this report.
Page 5
References
Energy Fuels Resources (USA) Inc., June 7, 2012, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assurance Plan (Revision 7.2).
HYDRO GEO CHEM, INC, May 7, 2012, Corrective Action Plan for Nitrate White Mesa Uranium Mill
near Blanding, Utah
Page 5
References
Energy Fuels Resources (USA) Inc., June 7, 2012, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assurance Plan (Revision 7.2).
HYDRO GEO CHEM, INC, May 7, 2012, Corrective Action Plan for Nitrate White Mesa Uranium Mill
near Blanding, Utah
Table 1 of 1
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-1
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-2 (Pumping well starting in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
3rd Qtr 9/27/2010
4th Qtr 12/7/2010
1st Qtr 1/26/2011
2nd Qtr4/20/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/17/2012
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
3rd Qtr 8/27/2013
4th Qtr 10/16/2013
1st Qtr 1/14/2014
2nd Qtr 5/6/2014
3rd Q.tr 8/5/2014
4th Qtr 10/8/2014
1st Qtr 2/18/2015
TWN-65 dup of TWN-1
2nd Qtr 5/13/2015
3rd Qtr 8/25/2015
0.5
0.6
0.6
0.6
6.5
0.5
0.5
0.5
17
20
19
14
1st Qtr 3/24/2010
2nd Qtr 6/2/2010
3rd Qtr 9/29/2010
4th Qtr12/9/2010
17
19
14
10
1st Qtr 2/1/2011
2nd Qtr4/28/2011
3rd Qtr 7/28/2011
4th Qtr 10/20/2011
0.6
0.6
0.6
0.43
15
17
17
1st Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
17.5 4th Qtr 7/17/2012
Nitrate Pumping System Started in January 2013
0.68
0.84
1.24
1.61
1.47
1.63
1.7
1.46
1.37
1.41
0.65
0.624
17.6
17.4
24.1
26.8
29.2
31.1
28
27.6
27.8
29.0
29.2
33.2
1st Qtr 2/19/2013
2nd Qtr4/24/2013
3rd Qtr 8/27/2013
4th Qtr 7/16/2013
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr 10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/12/2015
3rd Qtr 8/25/2015
62.1
69
69
__48
43
40
33
33
......31
48
54
22.10
.:-57,3
57.7
80.0
111
42.6
44.7
42.0
71
48.6
52.8
49.7
85
97
104
93
93
85
74
76
86
103
93
79
80.5
82.1
75.9
70.4
72.4
84.9
80
81
87.8
83.6
87.8
Monitoring Event
TWN-3
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-4
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/25/2010
2nd Qtr 6/3/2010
3rd Qtr 7/16/2010
4th Qtr 12/10/2010
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
1st Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4th Qtr 10/17/2012
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr 10/17/2013
1st Qtr 1/15/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr 10/9/2014
1st Qtr 2/19/2015
2nd Qtr5/14/2015
3rd Qtr 8/26/2015
25.3
26
27
24
111
118
106
117
1st Qtr 3/16/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4th Qtr 12/8/2010
24
26
25
25
138
128
134
129
1st Qtr 1/25/2011
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4th Qtr10/18/2011
25
24
27
12.1
143
152
158
149
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr 7/15/2012
Nitrate Pumping System Started in January 2013
22.2
27.2
20.9
23.5
19.6
23.6
19.5
19.1
19.4
17.2
16.2
157
158
171
163
160
168
174
153
164
141
156
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
3rd Qtr 8/27/2013
4th Qtr 7/16/2013
1st Qtr 1/14/2014
2nd Qtr 5/6/2014
3rd Qtr 8/5/2014
4th Qtr 10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/13/2015
3rd Qtr 8/25/2015
TWN-65 dup of TWN-4
0.9
1.0
0.9
1.0
0.9
0.9
1.1
0.9
0.9
1.1
1.4
1.45
1.5
1.63
1.6
1.69
1.4
1.6
2.0
1.44
1.48
0.733
0.974
1.160
22
22
19
21
21
21
35
20
....20
24
....25
26.4
25.3
24.4
27.2
29.4
28.4
29.6
28
30.7
31.5
31.9
35.2
35.2
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
Table 1 of 2
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-5
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-6
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/16/2010
2nd Qtr 5/26/2010
0.3 43
44
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
1.5
1.4
19
22
3rd Qtr 7/12/2010
4th Qtr12/7/2010
1st Otr1/25/2011...
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4th Qtr10/17/2011
0.3
0.3
0.3
0.4
0.3
0.3
0.3
43
45
47
44
44
45
3rdQtr 7/13/2010
4th Qtr 12/7/2010
1st Qtr 1/26/2011
1.4
1.2
73
21
1.1
1.5
18
222nd Qtr 4/20/2011
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
1.1
1.4
17
21
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/15/2012
0.2
0.3
0.3
<0.1
45
39
48
43.5
1st Qtr 1/10/2012
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr 7/15/2012
1.2
1.1
20
22
1.4
0.78
22
20.4
1st Qtr 2013 NA
2nd Qtr 2013 NA
1st Qtr 2013
2nd Qtr 2013
NA
NA
TWN-5 abandoned on July 31, 2013 3rd Qtr 2013
4th Qtr 2013
NA
NA
1st Qtr 2014
2nd Qtr 2014
3rd Qtr 2014
NA
NA
4th Qtr 2014
1st Qtr 2015
2nd Qtr 2015
3rd Qtr 2015
NA
NA
NA
NA
NA
Monitoring Event
TWN-7
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-8
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010
2nd Qtr 5/28/2010
3rd Qtr 7/14/2010
4th Qtr12/10/2010
1st Qtr 1/27/2011
2nd Qtr 4/21/2011
3rd Qtr 7/29/2011
4th Qtr10/19/2011
0.8
1.2
1.8
1
1.3
1.7
0.7
2.2
1st Qtr 3/16/2010
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
4th Qtr 12/7/2010
<0.1
<0.1
<0.1
11
11
11
<0.1
1st Qtr 1/25/2011
2nd Qtr 4/19/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
<0.1
<0.1
<0.1
<0.1
9....13
10
18.
10
11
15
11
11.4
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/26/2012
4th Qtr 10/16/2012
2.3
1.2
0.9
0.64
5’ 6
6
5.67
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 7/15/2012
<0.1
<0.1
<0.1
<0.1
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr 10/16/2013
1st Qtr 1/15/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr 10/9/2014
1st Qtr 2/19/2015
2nd Qtr 5/14/2015
3rd Qtr 8/6/2014
Nitrate Pumping System Started in January 2013
0.59
1.16
0.835
0.986
0.882
0.564
...0.9
0.968
1.04
0.779
0.348
5.68
5.88
6.96
5.7
5.75
5.26
....6
5.93
5.58
6.18
6.12
1st Qtr 2013
2nd Qtr 2013
NA
NA
TWN-8 abandoned on July 31, 2013
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
Table 1 of 3
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-9
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-10
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 7/15/2010
4th Qtr 12/9/2010
7.6
7.7
10.7
8.0
183
175
1st Qtr 3/23/2010 1.5
210
172
2nd Qtr 6/2/2010
3rd Qtr 7/14/2010
4th Qtr12/8/2010
1.0
54
30
0.2
1.3
21
28
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
1st Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4th Qtr 10/17/2012
1st Qtr 2013
2nd Qtr 2013
9.5
10.0
11.0
10.9
12.2
10.6
12.3
12.5
217
192
208
134
202
209
215
194
1st Qtr 1/26/2011 0.3
2nd Qtr 4/21/2011 1.2
40
28
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
0.1.
0.2
28
33
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
0.8
0.9
3rd Qtr 7/25/2012 0.6
4th Qtr 7/16/2012 0.12
44
28
....33
30.8
NA
NA
1st Qtr 2013
2nd Qtr 2013
NA
NA
TWN-9 abandoned on July 31, 2013 TWN-10 abandoned on July 31, 2013
Monitoring Event
TWN-11
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-12
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
1.4
1.3
73
72
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
0.7
0.8
113
106
1.4
4th Qtr 12/8/2010 1.4
76
72
3rd Qtr 7/12/2010 0.7
4th Qtr12/7/2010 0.7
1st Qtr 1/27/2011
2nd Qtr 4/26/2011
3rd Qtr 7/27/2011
4th Qtr 10/17/2011
1.4
1.4
0.1
84
76
1st Qtr 1/26/2011
2nd Qtr 4/26/2011
4.2
1.0
1.6
76
76
3rd Qtr 7/26/2011 0.6
4th Qtr 10/17/2011 1.2
1st Qtr 1/10/2011
2nd Qtr 4/19/2012
3rd Qtr 7/25/2012
4th Qtr 10/16/2012
1.6
1.6
69
71
1st Qtr 1/10/2012
2nd Qtr 4/18/2012
0.9
1.2
1.8
1.84
77
76.4
3rd Qtr 7/25/2012
4th Qtr 7/16/2012
1.4
1.41
112
103
...87
109
102
87
104
106
102
101
1st Qtr 2013
2nd Qtr 2013
NA
NA
1st Qtr 2013
2nd Qtr 2013
NA
NA
TWN-11 abandoned on July 31, 2013 TWN-12 abandoned on July 31, 2013
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
Table 1 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-13
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-14
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
3rd Qtr 9/27/2010
<0.1 47 1st Qtr 3/24/2010 2.9
2.9
24
300.1
4th Qtr12/7/2010
0.2
0.4
49
53
57
2nd Qtr 6/2/2010
3rd Qtr 7/15/2010
4th Qtr12/10/2010
1st Qtr 1/25/2011
2nd Qtr 4/26/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
1.6
<0.1
103
49
0.1
<0.1
49
48
1st Qtr 1/28/2011
2nd Qtr 4/27/2011
3rd Qtr 7/29/2011
4th Qtr 10/19/2011
3.5
4.2
3.7
3.5
3.5
3.9
26
28
24
30
25
27
26
27
27
27.4
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/15/2012
<0.1
<0.1
<0.1
46
53
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
0.1 48
47.3
3rd Qtr 7/27/2012
4th Qtr 7/17/2012
1st Qtr 2013
3.5
3.4
3.7
4.03
1st Qtr 2013
2nd Qtr 2013
NA
NA
TWN-13 abandoned on July 31, 2013
2nd Qtr 2013
3rd Qtr 2013
NA
NA
NA
4th Qtr 2013
1st Qtr 2014
2nd Qtr 2014
NA
NA
3 r d Qt r 2 014
4th Qtr 2014
NA
NA
NA
1st Qtr 2015
2nd Qtr 2015
3rd Qtr 2015
NA
NA
NA
Monitoring Event
TWN-15
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-16
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/18/2010
2nd Qtr 5/28/2010
3rd Qtr 7/13/2010
4th Qtr12/9/2010
0.7
1.0
1.0
1.2
43
39
36
38
1st Qtr 3/17/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4th Qtr 12/9/2010
1st Qtr 1/27/2011
2nd Qtr 4/27/2011
3rd Qtr 7/28/2011
4th Qtr 10/19/2011
1.4
1.6
1.6
1.3
43
49
47
38
1st Qtr 1/27/2011
2nd Qtr 4/27/2011
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/26/2012
4th Qtr 10/17/2012
1.5
1.6
2.1
1.79
38
46
50
47
1st Qt r 1/10/2 012
2nd Qtr 4/19/2012
3rd Qtr 7/25/2012
4th Qtr 7/16/2012
1.2
1.3
2.6
2
4.6
1.6
2.4
2.6
2.8
2.0
2.4
2.50
35
35
35
30
34
39
31
34
33
50
33
32.1
1st Qtr 2013
2nd Qtr 2013
NA
NA
TWN-15 abandoned on July 31, 2013
1st Qtr 2013
2nd Qtr 2013
3rd Qtr 2013
4th Qtr 2013
NA
NA
NA
NA
1st Qtr 2014
2 n d Qt r 2 014
3rd Qtr 2014
4th Qtr 2014
NA
NA
NA
NA
1st Qtr 2015
2nd Qtr 2015
3rd Qtr 2015
NA
NA
NA
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
Table 1 of 5
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-17
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-18
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010
2nd Qtr 6/3/2010
3rd Qtr 7/15/2010
4th Qtr 12/10/2010
10.4
11
8.9
8
78
87
1st Qtr 2/1/2011 8.6
66
65
90
1st Qtr 3/17/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
4th Qtr 12/9/2010
1st Qtr 1/27/2011
1.6
1.8
1.8
1.6
1.4
1.8
42
63
64
59
61
67
65
60
64
64
67
67.5
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011 8.5
81
74
2nd Qtr 4/26/2011
3rd Qtr 7/28/2011
4th Qtr 10/20/2011 8.1 71 4th Qtr 10/18/2011
1.8
1.9
1st Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 10/17/2012
8.7
9.1
9.5
9.65
79
80
1 85
84.8
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
3rd Qtr 7/26/2012
4th Qtr 7/16/2012
Nitrate Pumping System Started in January 2013
1.9
2.1
2.3
1.95
1st Qtr 2013
2nd Qtr 2013
3rd Qtr 2013
NA
NA
NA
TWN-17 abandoned on July 31, 2013
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
3rd Qtr 8/27/2013
4th Qtr 10/16/2013
1st Qtr /14/2014
2nd Qtr 5/6/2014
3rd Qtr 8/5/2014
4th Qtr 10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/13/2015
TW4-6S dup of TW4-18
3rd Qtr 8/25/2015
<0.10
2.27
2.32
2.04
2.15
2.33
2.18
1.8
1.47
1
1.35
0.35
68.7
64.3
70.4
67.3
68.4
76.5
70
74'8
73.3
76.6
76.9
81.3
Monitoring Event
TWN-19
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
Upper Wildlife Pond (UMLP)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
4th Qtr 12/9/2010
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/28/2011
4th Qtr 10/18/2011
7.2
6.2
7.2
7.0
7.0
6.9
7.1
6.5
118
113
1st Qtr 3/18/2010
2nd Qtr 6/2/2010
113
107
114
120
113
3rd Qtr 7/19/2010
4th Qtr 12/10/2010
1st Qt r 1/31/2011
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
<0.1
<0.1
<0.1
<1.0
<1.0
<1.0
<0.1
0.1
<0.1
<0.1
<1.0
<1.0
108
114
117
117
118
4th Qtr 10/19/2011 <0.1 <1.0
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
3rd Qtr 7/26/2012
4th Qtr 10/16/2012
1st Qtr 2013
2nd Qtr 2013
NA
NA
3rd Qtr 2013
4th Qtr 2012
NA
NA
1st Qtr 2014
2nd Qtr 2014
NA
NA
3rd Qtr 2014
4th Qtr 2014
NA
NA
1st Qtr 2015
2nd Qtr 2015
3rd Qtr 2015
NA
NA
NA
7.0
6.8
7.5
7.7
1st Qtr 1/31/2012 0.1
Pond no longer in service
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
NS = Not sampled
Table 1 of 6
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
Piezometer 1
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
Piezometer 2
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/10/2010
NS NS
7.2 52
1s t Qt r 2 010
2nd Qtr 6/2/2010
NS NS
0.6
0.6
0.2
0.3
0.3
0.1
0.1
0.1
0.1
0.2
0.2
0.19
6.8
6.5
52
60
3rd Qtr 7/19/2010
4th Qtr12/10/10
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
1st Qtr 1/11/2012
1st Qtr 1/10/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 10/17/2012
6.8
60
58
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
53
6.6
7.1
55
78
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
1st Qtr 1/11/2012
9
8
....9
8
9
1
8
’ ’ 9
9.5
7.0
6.6
114
58
7.2 56
1st Qtr 1/31/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
7.66 55 4th Qtr 7/17/2012
Nitrate Pumping System Started in January 2013
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
,4th Qtr 10/16/2013
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
8.11
8.88
7.83
6.68
6.79
7.57
5.1
56.7
53.3
55.1
54.1
56.2
52.1
55
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr 10/16/2013
0.22
0.172
0.198
0.36
0.169
0.736
0.8
0.755
9.67
10.3
9.66
9.22
11.4
H.4
123rd Qtr 8/6/2014
4th Qtr 10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/12/2015
3rd Qtr 8/26/2015
5.75
6.41
5.95
4.96
57.6
55.9
57.5
64.2
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/12/2015
3rd Qtr 8/6/2014
0.749
0.646
0.7
12.2
12.5
13.1
15.5
Piezometer 3
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
Pond D
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/9/2010
1.7
1.6
1.8
1.8
116
36
35
25
1st Qtr 2010
2nd Qtr 2010
3rd Qtr 2010
4th Qtr 2010
NS
NS
NS
NS
NS
NS
NS
NS
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
1.8 40 1st Qtr 1/31/2011
1.7
1.8
1.7
35
61
2nd Qtr 2011
12
3rd Qtr 2011
4th Qtr 2011
NS
NS
NS
0.1
NS
NS
NS
NS
NS
NS
NS
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 10/17/2012
1.8
1.7
20
53
1st Qtr 2012 NS
2nd Qtr 2012 NS
1.8
2.75
21
20.1
3rd Qtr 2012
4th Qtr 2012
NS
NS
Nitrate Pumping System Started in January 2013
1st Qtr 2/24/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr 10/16/2013
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr 10/8/2014
1.85
1.83
1.81
1.8
1.7
1.79
1.7
1.74
21
21.2
22.4
23.5
26
23.9
26
28.3
1st Qtr 2013
2nd Qtr 2013
3rd Qtr 2013
4th Qtr 2013
1st Qtr 2014
2nd Qtr 2014
3rd Qtr 2014
4th Qtr 2014
NA
NA
NA
NA
NA
NA
NA
NA
1st Qtr 2/18/2015
2nd Qtr 5/12/2015
3rd Qtr 8/26/2015
1.82
1.75
1.87
27.3
30.2
54.8
1st Qtr 2015
2nd Qtr 2015
3rd Qtr 2015
NA
NA
NA
NS = Not sampled
NA = Per the CAP and SCO, these wells not sampled 2013
Table 1 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
TW4*22( Pumping well starting in January 2013)
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TW4-24 (Pumping well stating in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
3rd Qtr 9/3/2013
4th Qtr 10/29/2013
58
50.2
29.7
45.2
635
586
487
501
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
3rd Qtr 9/3/2013
4th Qtr 10/3/2013
1st Qtr 1/27/2014
2nd Qtr 5/19/2014
3rd Qtr 8/11/2014
4th Qtr 10/21/2014
54.6
47.2
41.5
54.9
598
614
540
596
1st Qtr 1/27/2014
2nd Qtr 5/19/2014
3rd Qtr 8/11/2014
4th Qtr 10/21/2014
1st Qtr 3/9/2015
2nd Qtr 6/8/2015
3rd Qtr 8/31/2015
69.2
47.1
64.7
675
390
557
1st Qtr 3/9/2015
2nd Qtr 6/8/2015
3rd Qtr 8/11/2014
35.9
23.7
32.6
34.6
31.6
35
31.5
35.7
34.6
31.8
25.3
596
916
998
1,030
809
1,020
1,150
1,050
944
1290
788
TW4-25 (Pumping well starting in January 2013)
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
3rd Qtr 9/3/2013
4th Qtr 10/29/2013
1st Qtr 1/27/2014
2nd Qtr 5/19/2014
3rd Qtr 8/11/2014
4th Qtr10/21/2014
9
5.24
5.69
6.1
2.16
1.21
1.6
1.03
1st Qtr 3/9/2015
2nd Qtr 6/8/2015
3rd Qtr 8/31/2015
14.4
1.14
1.63
Chloride (mg/I)
190
136
119
88.6
85.7
51.1
67
58.1
310
58.3
69.2
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
Table 2
Summary of QA/QC Duplicate Sample
3rd Quarter 2015
Parameter GWQS Duplicate of TWN-4
TWN-4 TWN-65 RPD
Nitrate + Nitrite (as N)10 mg/L 0.974 1.16 -17.4
Chloride none 35.2 35.2 0.0
Tabel 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
3rd Quarter 2015
Data Discriptions
MW4 MW-26
Chloroform Pumping Wells
TW4-1 TW4-2 TW4-4 TW4-11 TW4-19 TW4-20 TW4-21
Nitrate Pumping Wells
TW4-37 TWN-2 TW4-22 TW4-24 TW4-25
Nitrate (mg/L)
Nitrate (g/L)
Nitrate (Ibs/L)
Nitrate (Ibs/gal)
Total gallons pumped
lbs of nitrate removed
Gallons of nitrate removed
48
4 79E-03
1 06E-05
4 01E-05
89,521
3 59
0 29
07
6 84E-04
1 51E-06
5 72E-06
21,042
0 12
0 01
63
6 28E-03
1 39E-05
5 25E-05
23,652
1 24
0 10
38
3 76E-03
8 31E-06
3 14E-05
21,587
0 68
0 06
65
6 45E-03
1 43E-05
5 39E-05
64,333
3 47
0 28
96
9 61E-03
2 12E-05
8 04E-05
3,584
0 29
0 02
11 6
1 16E-02
2 56E-05
9 70E-05
116,504
11 30
0 92
93
9 27E-03
2 05E-05
7 75E-05
17,657
1 37
0 11
14 7
1 47E-02
3 25E-05
1 23E-04
125,285
15 40
1 25
32 4
3 24E-02
7 16E-05
2 71E-04
118,064
31 99
2 60
49 7
4 97E-02
1 10E-04
4 16E-04
48,617
20 21
1 64
64 7
6 47E-02
1 43E-04
5 41E-04
24,620
13 32
1 08
25 3
2 53E-02
5 59E-05
2 12E-04
66,313
14 03
1 14
1 6
1 63E-03
3 60E-06
1 36E-05
124,137
1 69
0 14
Total lbs of nitrate removed from pumping wells inside nitrate plume
Total gallons of nitrate removed from pumping wells inside nitrate plume
107.62
8.76
Total lbs of nitrate removed from pumping wells outside nitrate plume
Total gallons of nitrate removed from pumping wells outside nitrate plume
Total lbs nitrate removed from all pumping wells
Total gallons of nitrate removed from all pumping wells
% lbs of nitrate removed by pumping wells inside nitrate plume
10.79
0.88
118.41
9 63
90 89